Current source type dual-active bridge type micro inverter, modulation method and system, and control method and system

The invention provides a current source type dual-active-bridge micro-inverter. The current source type dual-active-bridge micro-inverter comprises a photovoltaic panel assembly, an input capacitor, a primary side interleaved Buck/Boost circuit, a high-frequency transformer, a secondary side half-bridge circuit and a network side low-pass filter. The photovoltaic panel assembly is used for generating direct current; the input capacitor is connected with the photovoltaic panel assembly in parallel; a primary side interleaving Buck/Boost circuit, wherein an input side direct current port of the primary side interleaving Buck/Boost circuit is connected with the photovoltaic panel assembly; the primary side of the high-frequency transformer is connected with the primary side interleaved Buck/Boost circuit; the secondary side half-bridge circuit is connected with the secondary side of the high-frequency transformer; and the network side low-pass filter is connected with the direct current port of the secondary sid